Refacing-tool for puppet-valves.



F. 0. ALBERTSON. REFACING TOOL ron PUPPET VALVES.

APPLICATION FILED MAR. 21, I911.

Patented Nov. 26, 1918.

2 SHEETS-SHEET I.

5, ,ze gm 'F. 0. ALBERTSON. REFACING TOOL FOR PUFPET VALVES.

APPLICATION FILED MAR. 2!, I917- 1,285,573. Patented Nov. 26, 1918..

2 SHEETS-SHEET 2 W665: m a

flawed? @Z ZZ ZZ; Q

f d W 6 FRANS O. ALBERTSON, OF SIOUX CITY, IOWA, ASSIGNOR TO ALBERTSON & COMPANY, OF

SIOUX CITY, IOWA, A CORPORATION OFIOW-A;

REFACING-TOOL FOR PUPPET- VALVES.

Specification of Letters Patent.

Application filed March .21, 1917. Serial No. 156,253.

To all whom it may concern:

Be it known that I, FRANS O. ALBnR'rsoN, a subject of the King of Sweden, residing at Sioux City, in the county of Woodbury and State of Iowa, have invented a certain new and useful Improvement in Refacing-Tools for Puppet-Valves, of which the following is afull, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to devices for refacing valves particularly puppet valves, such as are used 1n connection with internal combustion engines and broadly stated the object of my invention is to provide a cheap, efficient, simple and generally improved device of this character.

The specific embodiment of my invention hereinafter described and laimed is in the nature of an improvement upon the device shown and described in United States Patent No. 1,087,625, granted to me on February 17 1914. The most. salient differences between the device to which my present invention is directed and that shown and de-- scribed in my aforesaid patent reside in the arrangement for rotating the valve, the

means for retaining the face of the valve against the cutting blade during the refaclng operation, and in the arrangement of parts whereby the means last mentioned may readily be swung out of its operative position when a valve is to be placed in or removed from the tool and is readily secured in operative position when a valve is to be subjected to the refacing operation.

The details of my improved tool as Well as the advantages afforded thereby will be set forth in the description to follow, wherein reference is made to the accompanying draw- %igure 1 is a side elevational view of my improved tool with a valve placed thereln ready to undergo the refacing operatlon;

Fig. 2 is an elevational view of one end of the device illustrating how the device is capable of being clamped and held between the jaws of a vise;

Fig.3 is an elevational view of the opposite end of the tool;

Fig. 41 is a view generally similar to Fig.

Patented Nov. 26, 1918.

3, but showing the movable bracket and screw. carried thereby swung out of alinement with the valve carrying elements;

Fig. 5 is a fragmentary sectional view taken on the line 5-5 of Fig. 3, with the valve removed,-and

Fig.6 is a vertical sectional view taken on the line 66 of Fig. 5.

Similar characters of reference refer to similar parts throughout the several views.

Referring more particularly to Figs. 1'

and 2, it will be noted that the device in question comprises a base in the form of a casting 10. This base or support is so conformed that it may be clamped between the jaws of a vise 11 when the refacing device is in use. However, it is not essential that the base of the refacing tool be clamped in a vise when a Valve is undergoing the refacing operation, because due to the improvements which characterize my operator need employ ut one hand in rotating the valve, thus leaving the other hand free to hold the device stationary while the valve and its stem are being turned during the refacing operation.

Disposed at one end of the baseorsupport 10 is a vertical bracket 12 conveniently formed integral with the base as shown, Also formed integral with the base intermediate the ends of the latter is a bracket 13 disposed arallel with the bracket 12, but of'considera 1y less height than the latter. Disposed upon the intermediate bracket 13 and conveniently secured thereto by a plurality of screws 14-14, one of which is most clearly shown in Fig. 5, is a bracket section 15, the upper edge of which lies in substantially the same horizontal plane as the upper edge of the fixed end-bracket 12. Formed in the upper edge of the fixed end-bracket 12 is a V shaped notch 16, and formed in the intermediate bracket section 15 is a corresponding V shaped notch 17, which is alined with the first mentioned notch 16. As will presently be explained, these notches 16 and 17 constitute a cradle wherein may be placed the stem of a valve, the head of which is to be subjeotedto the refacing operation. Associated with'the fixed end-bracket 12 and the resent invention the intermediate bracket section 15 are cross bars 18 and 19 respectively. Said cross bars serve to prevent a displacement of a valve stem resting in the notches 16 and 17 and are retained in position by the thumb screws 20 and 21 respectively.

Formed integral with the intermediate bracket section 15 and projecting horizontally therefrom in a direction away from the fixed end-bracket 12, is a boss 22 having a cylindrical surface of slightly more than 180 degrees. It will be noted that the V shaped notch which is formed in the intermediate bracket section 15 extends through the boss 22, as is most clearly illustrated in Fig. 5. Disposed upon the boss 22 is a collar 23 conveniently hexagonal in shape and provided with a beveled inner surface 24. Secured in a notch formed in the collar 23 is a truing blade 24 conveniently retained in position by a machine screw 25 extending through the collar and having its head countersunk therein, as shown most clearly in Fig. 5. The cutting edge 26 of the blade 24 is inclined to correspond with the inclination of the bevel of the valve to be refaced thereby. In the present instance the cutting edge is illustrated as having an inclination of forty-five degrees to the axis of the valve when the latter is placed in the tool.

In my former patent I have illustrated how the blade carrying collar may be provided with a plurality of blades and how the collar may be adjusted to bring any one of the said blades into operative position. In the present instance I have illustrated the blade carrying collar 23 as provided with but a single blade and fixed with respect to the boss 22 by a screw illustrated in dotted lines at 27 in Fig. 6. In the present instance, therefore, the blade carrying collar is not adjustable, but it will be understood that the same may be made adjustable and provided with a plurality of cutting blades if desired.

Disposed at that end of the base 10 opposite the fixed end bracket 12 is a swinging bracket 28, one leg of which is pivoted to the base 10 by a screw 29 extending freely through an aperture in the swinging bracket and engaging in the base. The other leg of the swinging bracket is provided With an elongated slot 30 struck on an axis substantially concentric with the axis of the pivot screw 29, the said slot being arranged to cooperate, as shown in Fig. 3, with a thumb screw 31 carried by the base 10. Carried by the swinging bracket 28 and extending therethrough is a comparatively long thumb screw 32, the threaded end of which is designed to engage the head of a valve when the same'is to undergo the refacing operation. 1

In utilizing my improved device for the purpose of refacing a valve head the thumb screw 31 is loosened and the swinging bracket moved to the position illustrated in Fig. 4. WVith the swinging bracket in this position the stem of the valve to be refaced may be placed in the device, as shown in Fig. 1, with the stem of the valve resting in the alined notches l6 and 17 formed in the end-bracket 12 and intermediate bracket section 15. The thumb screws 20 -20, and 2121 are then tightened down sufliciently to retain the valve stem within the notches. It will thus be seen that the notches 16 and 17 constitute in effect a cradle adapted to reedge of the blade 24, as is most clearly illustrated in Fig. 1. It will be noted that the base 10 is of such length that an ordinary valve stem extends for a considerable distance beyond the fixed end-bracket 12 when the valve is placed in the device. To this projecting end of the valve stem I apply a crank 33, the stem engaging arm of which is provided with an aperture of sufficientdiameter to receive valve stems of various sizes. The crank is secured upon the valve stem by a suitable set screw illustrated at 34.

To reface the valve head the crank 33 is ro- I tated and the screw 32 tightened up from time to time in order to keep the beveled surface of the valve head in engagement with the cutting edge of the blade 24. After the refacing operation has been completed the screws 20, 21, 31 and 34 are loosened, the crank removed from the valve stem and the swinging bracket moved to the positionshown in Fig. 4, whereupon the valve may be removed from the refacing tool.

It will thus be seen that I have provided,

a compact and eflieient device for refacing puppet valves and that in order to rotate the valve I apply the necessary power to the and provided .with a lateral extension, a In Witness whereof, I hereunto subscribe collar secured upon said extension, a truing my name this 17th day of March, A. D., blade, secured to said collar and projecting 1917.

from one side thereof, to engage the pe- FRANS O. ALBERTSON. riphery of the head of a valve to be ground, Witnesses:

and means for rotating the valve head rela- C. N. JEPsoN,

tive to said blade and in contact therewith. EDNA PEARSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

